Transmission Shifting Problems

[Mike Beyers]

I have an '03 SR5, V8 with 145K. It has been very well maintained, and never pushed to do anything that anyone here would consider extreme. The trans fluid was changed at 90K and again at 120k, both times with Toyota fluid. It now will not shift into 2nd or 3rd very well, and when it does it really slams into gear. When I check the fluid it looks very clean, although it seems a bit low. What is the right way to check the level?? Engine running or off? In Park or Neutral? The owner's manual does not specify. Anyone know?

thanks

 

[Onefastchevy]

Engine has to be running to check it, and in park on level ground. Warmed up a bit is also good. You could just be low on fluid, but that is a problem as well, means you have a leak to track down and fix.

 

[fdbyrne]

If you do have a leak, be sure to check the hard lines that run under the radiator to cool the transmission fluid. They have a way or rusting through. I've replaced mine and so have others.